Hi all,
I am new member seeking any advice or guidance with a project I have taken up helping a friend troubleshoot, and hopefully repair his much loved Marantz CD63 player.
The player in question has had a substantial amount of work done - capacitor upgrades, clock modification, regulator upgrades and has worked well for three years since the successful rejuvenation.
After 3 years the player has now developed an audio dropout fault which occurs approximately 10-15minutes into playing a cd. A description of the fault would best be described in the following way:
The problem:
-Cd spins up on 'play', audio output at both speakers.
-after 10-15minutes, popping soft hissing sound followed by a soft crackle
-audio drop out.
Cd continues to spin, counter continues to progress to other tracks.
When stop button or fwd/back button is depressed cd will spin up again with audio,play a few minutes and drop out again.
What I have tried:
I first suspected intermittent thermal faults, dry joints and overheating problems so I tried freezing spray.
Tried tracking back from outputs to DAC but found no variations in the outputs during play or at audio drop out.
I have tried resoldering components, checked opamps, DAC, digital signal, laser and many other suggestions offered by experienced people on other forums.
Used oscilloscope to check laser - eye pattern generated seemed steady and clear and complied with service manual specs.
I have access to digital and analogue voltmeters, soldering iron(s), oscilloscopes x2, 20mhz and 50mhz as well as the schematic/circuit diagrams for the cd player.
If anyone has had a similar issue and successfully diagnosed the fault it would be appreciated.
Looking forward to your responses.
Thank you
I am new member seeking any advice or guidance with a project I have taken up helping a friend troubleshoot, and hopefully repair his much loved Marantz CD63 player.
The player in question has had a substantial amount of work done - capacitor upgrades, clock modification, regulator upgrades and has worked well for three years since the successful rejuvenation.
After 3 years the player has now developed an audio dropout fault which occurs approximately 10-15minutes into playing a cd. A description of the fault would best be described in the following way:
The problem:
-Cd spins up on 'play', audio output at both speakers.
-after 10-15minutes, popping soft hissing sound followed by a soft crackle
-audio drop out.
Cd continues to spin, counter continues to progress to other tracks.
When stop button or fwd/back button is depressed cd will spin up again with audio,play a few minutes and drop out again.
What I have tried:
I first suspected intermittent thermal faults, dry joints and overheating problems so I tried freezing spray.
Tried tracking back from outputs to DAC but found no variations in the outputs during play or at audio drop out.
I have tried resoldering components, checked opamps, DAC, digital signal, laser and many other suggestions offered by experienced people on other forums.
Used oscilloscope to check laser - eye pattern generated seemed steady and clear and complied with service manual specs.
I have access to digital and analogue voltmeters, soldering iron(s), oscilloscopes x2, 20mhz and 50mhz as well as the schematic/circuit diagrams for the cd player.
If anyone has had a similar issue and successfully diagnosed the fault it would be appreciated.
Looking forward to your responses.
Thank you
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